1 files changed, 78 insertions, 0 deletions
diff --git a/jni/ruby/lib/rubygems/ext/ext_conf_builder.rb b/jni/ruby/lib/rubygems/ext/ext_conf_builder.rb
new file mode 100644
index 0000000..d11d1ac
--- /dev/null
+++ b/jni/ruby/lib/rubygems/ext/ext_conf_builder.rb
@@ -0,0 +1,78 @@
+#--
+# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
+# All rights reserved.
+# See LICENSE.txt for permissions.
+#++
+
+require 'fileutils'
+require 'tempfile'
+
+class Gem::Ext::ExtConfBuilder < Gem::Ext::Builder
+  FileEntry = FileUtils::Entry_ # :nodoc:
+
+  def self.build(extension, directory, dest_path, results, args=[], lib_dir=nil)
+    # relative path required as some versions of mktmpdir return an absolute
+    # path which breaks make if it includes a space in the name
+    tmp_dest = get_relative_path(Dir.mktmpdir(".gem.", "."))
+
+    t = nil
+    Tempfile.open %w"siteconf .rb", "." do |siteconf|
+      t = siteconf
+      siteconf.puts "require 'rbconfig'"
+      siteconf.puts "dest_path = #{tmp_dest.dump}"
+      %w[sitearchdir sitelibdir].each do |dir|
+        siteconf.puts "RbConfig::MAKEFILE_CONFIG['#{dir}'] = dest_path"
+        siteconf.puts "RbConfig::CONFIG['#{dir}'] = dest_path"
+      end
+
+      siteconf.flush
+
+      destdir = ENV["DESTDIR"]
+
+      begin
+        cmd = [Gem.ruby, "-r", get_relative_path(siteconf.path), File.basename(extension), *args].join ' '
+
+        begin
+          run cmd, results
+        ensure
+          FileUtils.mv 'mkmf.log', dest_path if File.exist? 'mkmf.log'
+          siteconf.unlink
+        end
+
+        ENV["DESTDIR"] = nil
+
+        make dest_path, results
+
+        if tmp_dest
+          # TODO remove in RubyGems 3
+          if Gem.install_extension_in_lib and lib_dir then
+            FileUtils.mkdir_p lib_dir
+            entries = Dir.entries(tmp_dest) - %w[. ..]
+            entries = entries.map { |entry| File.join tmp_dest, entry }
+            FileUtils.cp_r entries, lib_dir, :remove_destination => true
+          end
+
+          FileEntry.new(tmp_dest).traverse do |ent|
+            destent = ent.class.new(dest_path, ent.rel)
+            destent.exist? or FileUtils.mv(ent.path, destent.path)
+          end
+        end
+      ensure
+        ENV["DESTDIR"] = destdir
+      end
+    end
+    t.unlink if t and t.path
+
+    results
+  ensure
+    FileUtils.rm_rf tmp_dest if tmp_dest
+  end
+
+  private
+  def self.get_relative_path(path)
+    path[0..Dir.pwd.length-1] = '.' if path.start_with?(Dir.pwd)
+    path
+  end
+
+end
+